Ignition-timer



E. B. JACUBSON.

IGNITION IIIIIER.

APPLICATION F'ILED IIIAII.2II. I9I9.

Patented Dec. 1G, 1919.

W'/ TNISSSES y EnWAnD B. JACOBSON,

I l .To all-waant it may concern:A

TU sTATEs PATENT OFFICE.

or `i1'i`rTsr1ELD, MASSACHUSETTS, Assinivon To JAND E MANU- FACTURING COMPANY, Aor PITTSFIELD, MASSACHUSETTS; A CORPORATION or MASSACHUSETTS.

that I, EDWARD B.. JAcoBsoN,

.I fa citizen of the UnitedStates, residing at -lP-ittslield, in the county, of Berkshire and 'StateA of Massachusetts, 4have invented cerr tain new. and useful Improvements in Ig- .j specification.

l' cation -iledby ine November nition-Timers, of which the following is a invention relates to ignition particularly to rotary portion. operation this ii'iveiition closely resembles the ignition timing apparatus described in a prior applillhe'I present timing apparatus, and more No. 261,607; and also the invention `described UnitedStates Letters Patent issued ine -The principal object of the invcntionis to yprovide an improved tactor to avoid the usual gumm'ing and poor Jun'e27,11916, No. 1,188,451, for ignition timer, the improvements thereon to which this application relates contactor carriedby the rotary portion, and involvinga substitute structure for 4the prior corresponding part.`

self-lubricating con- I circuit connections caused by the use of fluid outer -radial carrier-arm,

object is to provide rigid setting and `tical sectionof the rotor lubricants. A.- further object is the' p rovision'of improved means to prevent arcing of the electric current-'between the con- -tactor and the several contact elements mounted in the timer casing. A still further a contactor which has a an even wiping surface adaptedto wear evenly the surface of the several contact elements mounted in the casing, thus avoiding the inequalities of surface wear caused by the use of a movable contactor. o

Referring to the accompanying drawing, Figure 1 is a longitudinal vertical section of timer embodying the present cross section of the same on a line intermediate .the rotor portion and the face-of the housing; Fig. 3, a

portion mounted as shown in Fig. 1; Fig. 4:, a vertical cross-section of the 'rotor assembly on a plane coincident with the inner face ofthe the pivotal movebeing indicated in ment of the contact arm I A dotted lines; Fig. 5, a top view of the con- 8p, 1918, Serial.

being confined to the' longitudinally very iGNITIoN-TIMEiz. l

tactor carried by the rotor portion; and

cani-shaft 3, 'which ispreferablygeared to the main engine shaft (not shown) and exvtends through a suitable opening inthe wall of the engine housing.

The rear end of the'casing 1 is open and seated in a circularrecess 4: provided on the face of the engine housing 2, said recess being adapted to prevent eccentric displacement ofthe casing. Forward displacement of the casing is prevented preferably by a spring clamp 5 removably secured at its rear end to astud or bolt 6 fixed to the Wall of the engine housing 2, and engaging at its opposite end the outer extremity of the reduced forward extension of the front of the casing,

`which has a central depression to receive a boss 7 `provided on theclamp 5'. Axial movement of thepcasing for re lating the time of ignition is controlled a lateral arm 8 exteriorly mounted on the casing and provided with a bearing 9 to receive a. control-rod -(not shown.)

Within the casing 1 is an insulation ring 10 provided at regular intervals with arcuate contacts 11, 11,'.which are embedded on its inner rim and suitably connected to Patented Dec. 16, 1919.

- l Application filed March 28, 1919. Serial No. 285,742. v

-suitable form of housing or casing, the cas- `2 and Aarranged to inclose thefront end of a separate terminals. 12, 12, etc., arranged on the outside of the casing 1, for connection with the primary circuit of separate induction coils.

Mounted to rotate with the shaft 3 within the'casing 1 is a metallic carrier 13 in the form of a sleeve which is normally Secured against axial movement on the shaft by a transversely arranged removable pin lel projecting through a suitable opening in the shaft and extending at one of its ends into a, slot provided on the outer rim of the carrier. 'IheV pin 14 is secured against endwise displacement by a cup washer 1 6` fitted over the outer end of the carrier and inclosing the exposed end of the pin 14, the,

reduced outer end 17. of the shaft being prejected through the cup washer 16 and suitably threaded to receive a pair of nuts 13, 19, which are employed in conjunction with a flat washer 20, carried on the reduced end ,of the shaft and engaging the face of the at their extremities to prevent lateral dis placement of the plates. The contact-arm is reinforced centrally by a transverse spacer-pin 25, which is similar in form and manner of attachment to the' pin 23, and is adapted to maintain the relative spacing of the plates 22, 22. Y

Mounted between the front ends of the plates 22, 22, and secured thereto in manner similar to the pins 23, 25, is a separate contact-supporting pin 26, preferably of uniform diameter and adapted to extend -through a corresponding openincr provided in the base of the contacter 27 which has a solid body structure of substantially square formationv in cross-section and is rigidly seated in the jaw formed by the plates 22, 22. The side faces of the contacter 27are cut away at 28, 28, to seat the outer extremities of the plates 22, 22, which are also preferably cut away on their upper margins to provide even supporting edges.

The outer or top-face of the contacter 27 is arcuate in outline to 'conform to the curved surface of the insulation ring 10 'which it normally engages by an even sliding contact, lproper lubrication of the opposing faces of these parts being supplied from a centrally arranged transverse slot 29 pros vided in the top face of the contacter andl extending inward to a middle point ofv its length, and adapted to receive a preferred form of solid lubricant, such as a composition of graphite and tallow which is released gradually and proportionately to the wear of the surface of the contacter, thus avoiding unnecessary gummingof the surface.

l -Arcing of the electric currentat the instant of opening or closing the circuit accordingly as the contacter reaches or leaves the severa-l.contact-elements is prevented by the "through the medium of the contacter un-l Y der the impulse of a torsion spring 31 which is constructed, arranged and operated in the manner shown and described in my said priorLetters Patent, While the outward swing of the contact-arm assembly is limited by the provision of positive stops 32, 32, also constructed and arranged as shown and described in the aforesaid Letters Patent, reference -to which is herein made for further particulars.

I claim: A 1. In an ignition timer, the combination with a casing and contact-elements mounted in the casing, of a rotary portion mounted to move in the casin and comprisinnr a carrier, an arm pivota ly secured to t e earrier and having avfree end terminating in a jaw adapted to be swung toward and away from the contact-elements, a stationary contacter having a body-portion seated at its outer end laterally away from the contactarm, saidouter end havin a bearing-face adapted to establish a wiping contact successively with the contact-elements in the inner end in said jawand extending at its casing. and havingan opening therein for carrying a lubricant for distribution on the contact-elements. l

2. In an' ignition timer, the combination with a casing and contact-elements mounted in the casing, of a rotary portion mounted to move in the casing and comprising a carrier, an armpivotally secured to the carrier and having a free end terminating in a'jaw adapted to be swung toward and away from the contact-elements, a stationary contacter having a body-portion seated in said jaw and extending laterally away from the contact-arm and terminating at its outer end in a bearing-face adapted to establish a wiping contact successively with the contactelements in the casing, and means provided on the contacter for preventing arcing of the electric current between the contacter and the contact-elements.

'3; In an ignition timer, the combination with a casing and'contact-elements mounted in the-casing, of a rotary portion mounted to move in the casing and comprising a carrier, an arm pivotally secured to the carrierand having a free 'end terminating in a jaw adapted to be swung toward and away from the contactelements,a stationary contacter having a contact block rigidly seated in said jaw and extending toward the contact-elements and terminating at its outer end in a cu-rvedcontact face conformed to the facial are of ech of the contact-elements and havlng a Centrally arranged transverse slot thereln to receive a lubricatlng substance for distribution successively on the Contactelements. l

4. In an ignition timer; the combination with a casing and contact-elements mounted in the'casing, of a. `rotary portion mounted to move in the easingand comprlsing a carrier, mi arm pivotaliy secured to the carrier and having a free end terminating in a j aw adapted to be swung toward and away from the contact-elements, a, stationary metallic Contact member seated insaid jaw and eX- tendi'ng toward. the contact-elements and terminating at its outer end in a curved contact face corresponding` in outline to tbe 'facial are of the `-contacte1ements, and insu- EDWARD B, JACOBSON..

Witnesses: i

JNO. J. Wrm'rLEsEY, LE ROY E. SHAW. 

